I hate to rain on your parade but antacids are really not good for you. Believe it or not I used to keep a huge bottle of these next to the bed for years. Midnight heartburn was the worst. Then I found out the problem was not excess acid but not enough acid, to fully digest a meal. I have been taking apple cider vinegar tablets with every meal for a few years now and have not had one bout of heartburn. Take one before and after eating pizza (used to give me heartburn just smelling it) and no problem. I turned my whole family, my wife, and several friends on to this and they all had the same results.

So hopefully you didn't pay too much so that throwing them away won't give you heartburn:)